package com.dingding.gmall.member.exception;

/**
 * @author liudingding
 * @ClassName UsernameException
 * @description
 * @date 2021/7/22 10:52 下午
 */
public class UserNameException extends RuntimeException {

    public UserNameException() {
        super("存在相同的用户名");
    }
}

